This week, new Saturday Night Live cast member Sasheer Zamata took Girls fans on a tour of Brooklyn, and on the series itself, Marnie (Allison Williams) discovered a cringe-worthy — yet hilarious — video of herself on YouTube. The new Starz series Black Sails got an early premiere online, while Frozengot unnecessarily censored. Jennifer Lawrence flipped out on the red carpet at the SAG Awards when an interviewer dropped a major Homeland spoiler on her, and Ellen DeGeneres helped Seth Meyers practice his celebrity interviewing skills before he takes over Late Night next month. Check out those clips and more in our weekly roundup of the best online videos:

Girls Tour:SNL's newest cast member, Sasheer Zamata, made her debut on the show last week, but really shows off her comedic chops in this video for Lorne Michaels' online channel Above Average. Here, she plays Madison,an Oberlin College alum who majored in "Denim Theory,"and who now gives Girls-themed tours of Greenpoint, Brooklyn, to fans of the HBO show.

Marnie's "What I Am" video: Speaking of Girls, a plotline in the most recent episode involved Marnie discovering that her ex-boyfriend had posted a mortifying video of her covering Edie Brickell's "What I Am" on YouTube. Only snippets of the clip were featured in the episode, but we're officially requesting a full-length version STAT.

Jennifer Lawrence's Homeland spoiler: Jennifer Lawrence experienced a full roller coaster of emotions on the red carpet of the SAG Awards. Watch the actress go from starstruck at seeing Homeland's Damian Lewis to "past mad" after an Access Hollywood reporter spoils the show's Season 3 finale for her.

Black SailsPremiere: Starz's new pirate series from Michael Bay, Black Sails, doesn't officially premiere until Saturday, but fans can get a sneak peek of the first episode on the YouTube channel Machinima Prime. Check it out below (via Tubefilter):

Seth Meyers practices interviewing with Ellen: As SaturdayNight Live "Weekend Update" co-anchor Seth Meyers gears up to take over Late Nightfrom Jimmy Fallon in February, he tells Ellen DeGeneres that what he's most nervous about is conducting non-scripted celebrity interviews. So Ellen helped him practice:

Frozen censored: We may be going to hell for giggling uncontrollably at this video, but there's just something hysterical about unnecessarily censoring the lyrics to Disney songs so that they sound much filthier than intended.